Codeigniter build validation class at your own needs - php

Question

I am working in codeigniter and Iam looking to make my own custom validation class using "Validation_form" library and my custom rule where I will place my own validation rules and use that from everywhere in my project, but this seems impossible, I tried in couples ways to handle this but nothing.
Codeigniter kindle force me to make my callback methods in my controller but I need them in my library or "method" or wherever else!!!
My question is, can I build an specific library where I'll place my validation rules and other functions I need to handle that?

Answer 1

you could create a new library in application/libriries and name the file MY_Form_validation
What you are doing here is extending the form_validation class so that you will not need to mess with the core files.
The MY_ is what is set on your config, be sure to check it if you changed yours.
sample MY_Form_validation.php
class MY_Form_validation Extends CI_Form_validation
{
//this is mandatory for this class
//do not forget this or it will not work
public function __construct($rules = array(){
parent::__construct($rules);
$this->CI->lang->load('MY_form_validation');
}
public function method1($str){
return $str == '' ? FALSE : TRUE;
}
pulic function method2($str)
{
//if you want a validation from database
//you can load it here
// or check the `form_validation` file on `system/libraries/form_validation`
}
public function check_something_with_post($tr)
{
return $this->CI->input->post('some_post') == FALSE ? FALSE : TRUE;
}
}
Basically, when you call a rule sample method1|method2 the value of your post field will be the parameter of the method. if you want to check other post you can do it by using $this->CI->input->post('name of the post');
when you want to pass a parameter just look at the form validation is_unique or unique code on system/libraries/form_validation you will have an idea.
To create a error message that goes with it go to application/language/english/MY_Form_validation_lang
Sample MY_form_validation_lang.php
$lang['method1'] = "error error error.";
$lang['method2'] = "this is an error message.";
if english does not exist on your application/language just create it.
check more atCreating libraries
NOTE:
On some linux or debian server you may want to change the file name from MY_Form_validation to
MY_form_validation note the small f on the word form.